Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\frac{3.21}{14.15}=\frac{3.3.7}{2.7.3.5}=\frac{3}{2.5}=\frac{3}{10}\)
\(\frac{3\cdot21}{14\cdot15}\)
\(=\frac{3\cdot3\cdot7}{2\cdot7\cdot3\cdot5}=\frac{3}{2\cdot5}=\frac{3}{10}\)
Ý bạn đề như vậy à???
Rút gọn phân số: \(\dfrac{-270}{450}\);\(\dfrac{11}{-143}\);\(\dfrac{32}{12}\);\(\dfrac{-26}{-156}\)
\(\dfrac{-270}{450}=\dfrac{-9}{15}\)
\(\dfrac{11}{-143}=\dfrac{1}{-13}\)
\(\dfrac{32}{12}=\dfrac{8}{3}\)
\(\dfrac{-26}{-156}=\dfrac{1}{6}\)
a) \(\frac{270}{-450}+\frac{4545}{5454}=-\frac{3}{5}+\frac{5}{6}=\frac{7}{30}\)
b) \(\frac{-33}{429}+\frac{-156}{-26}+\frac{224}{-84}=\frac{-1}{13}+6+\frac{-56}{21}=\frac{127}{39}\)
c) \(\frac{405}{-567}+\frac{-161}{552}+\frac{162}{-243}=-\frac{5}{7}+\frac{-7}{24}+\frac{-2}{3}=\frac{-281}{168}\)
d) \(-\frac{2}{3}\left(\frac{2}{18}+\frac{-6}{12}-\frac{3}{33}\right)=-\frac{2}{3}\left(\frac{1}{9}+\frac{-1}{2}-\frac{1}{11}\right)\)
\(=-\frac{2}{3}.\left(-\frac{95}{198}\right)=\frac{95}{297}\)
rút gọn các phân số sau;
270/450 26/156 123123/237237
4116-14/10290-35 3*3+3*7/6*5+9 6*9-2*17/63*3-119
\(\frac{270}{450}=\frac{270:90}{450:90}=\frac{3}{5}\)
\(\frac{26}{156}=\frac{26:26}{156:26}=\frac{1}{6}\)
\(\frac{123123}{237237}=\frac{123123:3003}{237237:3003}=\frac{41}{79}\)
\(\frac{17.5-17}{3-20}=\frac{68}{-17}\)
\(\frac{49+7.49}{49}=\frac{8.49}{49}=8\)
\(\frac{3.21}{14.15}=\frac{1.3.7.3}{2.7.3.5}=\frac{1.3}{2.5}=\frac{3}{10}\)
-270/450 = -3/5
-26/-156 = 1/6
3.21/ 14.15 = 3/10
-270/450=-3/5
-26/-156=1/6
3.21/14.15=(3.7.2^2)/(2*7*5*3)=2/5